white smoke issue????
Thread Starter
|
Mountain Pass
Joined: Jun 2010
Posts: 132
Likes: 7
From: tallahassee, fl
white smoke issue????
Ok, 2000 f250 with new rebuilt 7.3 with perfect compression numbers. I have rebuilt injectors with stage 2 nozzels, oil has been changed since rebuilt engine. I am getting a pretty good amount of smoke coming with normal acceleration from a stop. Truck starts and runs like new with perfect compression and no blowby. Just really smokey...... I have lil over 2k on engine since rebuilt and has done this since rebuilt was put in, just thought it was my injector making this happen. also truck has no smoke on cold starts since rebuilt engine and has been in the mid 30s here last couple of weeks. Truck fires right up runs perfect with no romps or anything like that with older injectors on cold starts. I just can't catch a break. I have an autoenteguity and have ran buzz and contribution test and come back fine. Wish there was a way to cut out each injector to check them while going down the road....
any clues or hints please.....
__________________
any clues or hints please.....
__________________
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
Does the smoke smell like diesel? If it smells like diesel an injector may be sticking open and diesel is being pumped out during the exhaust stroke. But I would think that it would also be dong some smoking at idle and not just on acceleration. 
The only way I can think of to determine if it is one injector is by using a breakout box.
Did you do a Rotational Velocity test?
The only way I can think of to determine if it is one injector is by using a breakout box. Did you do a Rotational Velocity test?
Thread Starter
|
Mountain Pass
Joined: Jun 2010
Posts: 132
Likes: 7
From: tallahassee, fl
Does the smoke smell like diesel? If it smells like diesel an injector may be sticking open and diesel is being pumped out during the exhaust stroke. But I would think that it would also be dong some smoking at idle and not just on acceleration. The only way I can think of to determine if is one injector is by using a breakout box.
Did you do a Rotational Velocity test?
The only way I can think of to determine if is one injector is by using a breakout box. Did you do a Rotational Velocity test?
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
I have never done any trouble shooting for your symptoms so this is trial & error. We may both learn smething.
Any other ideas guys. Someone else must have had this problem before.
Thread Starter
|
Mountain Pass
Joined: Jun 2010
Posts: 132
Likes: 7
From: tallahassee, fl
Ok, I did run that test. I have read many threads on certain cps causing to fail cc test with 3 and 8 cyl. On those two I read 2.8-2.9% and all the others looked fine. I am beginning to think this truck hates me.. lol I have put over 6k into this thing in the past few months to still have issues......
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
Ok, I did run that test. I have read many threads on certain cps causing to fail cc test with 3 and 8 cyl. On those two I read 2.8-2.9% and all the others looked fine. I am beginning to think this truck hates me.. lol I have put over 6k into this thing in the past few months to still have issues......
The dark colored CPS on the right is the latest.
Another question: Is there any oil in the tail pipe? or just soot?
Thread Starter
|
Mountain Pass
Joined: Jun 2010
Posts: 132
Likes: 7
From: tallahassee, fl
nope I have the one on the right , got it from international about 8-9 months ago. Just soot in the tailpipe.
Trending Topics
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
No oil in tailpie means no small oil leak in turbo so that is ruled out.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Mountain Pass
Joined: Jun 2010
Posts: 132
Likes: 7
From: tallahassee, fl
would low fuel pressure be able to cause a smoking problem? But then you would think if I had low fuel pressure I would have a rough running truck or bucking of some sorts. Truck runs perfect and strong so I am clueless.
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
One way to tell if an injector is acting up is with a no-touch laser thermometer. Aim it along each exhaust manifold and sometimes a bad injector will show up as a bit cooler or hotter area where that cylinder exhausts into the manifold. Don't know if this will work but if fuel is being exhausted there may be a slightly cooler temp at the exhaust manifold for a particular cylinder. Worth a try if you have access to a laser thermometer. Other then a break-out box I can't think of any other way to diagnose a single cylinder/injector problem.
I have always meant to buy a no-touch thermometer at harbor freight but when i'm there I forget. Closest one to me is over 80 miles.
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
but I'm trying to think through it as rationally as I can. Can't get anywhere without trying something.
